Package io.trino.sql.planner.optimizations

Class AdaptivePartitioning

java.lang.Object

io.trino.sql.planner.optimizations.AdaptivePartitioning

All Implemented Interfaces:

AdaptivePlanOptimizer, PlanOptimizer

public class AdaptivePartitioning
extends Object
implements AdaptivePlanOptimizer

This optimizer is responsible for changing the partition count of hash partitioned fragments at runtime. This uses the runtime output stats from FTE to determine estimated memory consumption and changes the partition count if the estimated memory consumption is higher than the runtimeAdaptivePartitioningMaxTaskSizeInBytes * current partitionCount.

Nested Class Summary

Nested classes/interfaces inherited from interface io.trino.sql.planner.optimizations.AdaptivePlanOptimizer

AdaptivePlanOptimizer.Result

Nested classes/interfaces inherited from interface io.trino.sql.planner.optimizations.PlanOptimizer

PlanOptimizer.Context

Constructor Summary

Constructors

Constructor	Description
AdaptivePartitioning()

Method Summary

Modifier and Type	Method	Description
static boolean	consumesHashPartitionedInput(PlanFragment fragment)
AdaptivePlanOptimizer.Result	optimizeAndMarkPlanChanges(PlanNode plan, PlanOptimizer.Context context)	Optimize the plan and return the changes made to the plan.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface io.trino.sql.planner.optimizations.AdaptivePlanOptimizer

optimize

Constructor Details

AdaptivePartitioning

public AdaptivePartitioning()

Method Details

optimizeAndMarkPlanChanges

public AdaptivePlanOptimizer.Result optimizeAndMarkPlanChanges(PlanNode plan,
 PlanOptimizer.Context context)

Description copied from interface: AdaptivePlanOptimizer

Optimize the plan and return the changes made to the plan.

Specified by:

optimizeAndMarkPlanChanges in interface AdaptivePlanOptimizer

consumesHashPartitionedInput

public static boolean consumesHashPartitionedInput(PlanFragment fragment)